1,510 research outputs found

    Provincialising whiteness: Òyìnbó and the politics of race in Lagos, Nigeria

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    Much academic work on racialisation processes to date has focused on a geographically restricted range of racial regimes characterised by white supremacy. This study broadens the geographical scope of analyses by looking at race-making practices in Lagos, Nigeria. I explore the geographical specificity of race-making in Lagos through interrogation of the concept of òyìnbó – a Yorùbá word most often translated into English as ‘white person.’ By highlighting the particular meanings attached to òyìnbó, and the political work that racialisation does in this understudied context, I argue for the need to provincialise understandings of whiteness in studies of global race-making processes. The project is based upon eleven months of ethnographic fieldwork with Lagosians of different generations and social demographics at three different research sites: a senior secondary school, the University of Lagos, and at a church. My findings suggest that divergent meanings are attached to òyìnbós in these contexts, which do not universally celebrate whiteness. Rather, the practice of race-making in Lagos predominantly addresses local political concerns, and common attributes associated with òyìnbós are primarily evaluated according to local people’s own moral economy. This results in highly ambivalent attitudes to òyìnbós as individuals and to òyìnbó as trope. I suggest that these attitudes can best be explained by situating constructions of òyìnbós within their wider social context in Lagos. By centring local understandings in this way, I argue that the political practice of race-making in Lagos is not purely a reflection of a singular, global racial hierarchy, but a means of actively engaging with global and local power structures. I propose that seeking to understand the emic nature of divergent global race-making processes in this way has the potential to broaden academic understanding of these and related social phenomena

    Comparing the production of a formula with the development of L2 competence

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    This pilot study investigates the production of a formula with the development of L2 competence over proficiency levels of a spoken learner corpus. The results show that the formula in beginner production data is likely being recalled holistically from learners’ phonological memory rather than generated online, identifiable by virtue of its fluent production in absence of any other surface structure evidence of the formula’s syntactic properties. As learners’ L2 competence increases, the formula becomes sensitive to modifications which show structural conformity at each proficiency level. The transparency between the formula’s modification and learners’ corresponding L2 surface structure realisations suggest that it is the independent development of L2 competence which integrates the formula into compositional language, and ultimately drives the SLA process forward

    Adaptive Microarchitectural Optimizations to Improve Performance and Security of Multi-Core Architectures

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    With the current technological barriers, microarchitectural optimizations are increasingly important to ensure performance scalability of computing systems. The shift to multi-core architectures increases the demands on the memory system, and amplifies the role of microarchitectural optimizations in performance improvement. In a multi-core system, microarchitectural resources are usually shared, such as the cache, to maximize utilization but sharing can also lead to contention and lower performance. This can be mitigated through partitioning of shared caches.However, microarchitectural optimizations which were assumed to be fundamentally secure for a long time, can be used in side-channel attacks to exploit secrets, as cryptographic keys. Timing-based side-channels exploit predictable timing variations due to the interaction with microarchitectural optimizations during program execution. Going forward, there is a strong need to be able to leverage microarchitectural optimizations for performance without compromising security. This thesis contributes with three adaptive microarchitectural resource management optimizations to improve security and/or\ua0performance\ua0of multi-core architectures\ua0and a systematization-of-knowledge of timing-based side-channel attacks.\ua0We observe that to achieve high-performance cache partitioning in a multi-core system\ua0three requirements need to be met: i) fine-granularity of partitions, ii) locality-aware placement and iii) frequent changes. These requirements lead to\ua0high overheads for current centralized partitioning solutions, especially as the number of cores in the\ua0system increases. To address this problem, we present an adaptive and scalable cache partitioning solution (DELTA) using a distributed and asynchronous allocation algorithm. The\ua0allocations occur through core-to-core challenges, where applications with larger performance benefit will gain cache capacity. The\ua0solution is implementable in hardware, due to low computational complexity, and can scale to large core counts.According to our analysis, better performance can be achieved by coordination of multiple optimizations for different resources, e.g., off-chip bandwidth and cache, but is challenging due to the increased number of possible allocations which need to be evaluated.\ua0Based on these observations, we present a solution (CBP) for coordinated management of the optimizations: cache partitioning, bandwidth partitioning and prefetching.\ua0Efficient allocations, considering the inter-resource interactions and trade-offs, are achieved using local resource managers to limit the solution space.The continuously growing number of\ua0side-channel attacks leveraging\ua0microarchitectural optimizations prompts us to review attacks and defenses to understand the vulnerabilities of different microarchitectural optimizations. We identify the four root causes of timing-based side-channel attacks: determinism, sharing, access violation\ua0and information flow.\ua0Our key insight is that eliminating any of the exploited root causes, in any of the attack steps, is enough to provide protection.\ua0Based on our framework, we present a systematization of the attacks and defenses on a wide range of microarchitectural optimizations, which highlights their key similarities.\ua0Shared caches are an attractive attack surface for side-channel attacks, while defenses need to be efficient since the cache is crucial for performance.\ua0To address this issue, we present an adaptive and scalable cache partitioning solution (SCALE) for protection against cache side-channel attacks. The solution leverages randomness,\ua0and provides quantifiable and information theoretic security guarantees using differential privacy. The solution closes the performance gap to a state-of-the-art non-secure allocation policy for a mix of secure and non-secure applications

    QoS-aware architectures, technologies, and middleware for the cloud continuum

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    The recent trend of moving Cloud Computing capabilities to the Edge of the network is reshaping how applications and their middleware supports are designed, deployed, and operated. This new model envisions a continuum of virtual resources between the traditional cloud and the network edge, which is potentially more suitable to meet the heterogeneous Quality of Service (QoS) requirements of diverse application domains and next-generation applications. Several classes of advanced Internet of Things (IoT) applications, e.g., in the industrial manufacturing domain, are expected to serve a wide range of applications with heterogeneous QoS requirements and call for QoS management systems to guarantee/control performance indicators, even in the presence of real-world factors such as limited bandwidth and concurrent virtual resource utilization. The present dissertation proposes a comprehensive QoS-aware architecture that addresses the challenges of integrating cloud infrastructure with edge nodes in IoT applications. The architecture provides end-to-end QoS support by incorporating several components for managing physical and virtual resources. The proposed architecture features: i) a multilevel middleware for resolving the convergence between Operational Technology (OT) and Information Technology (IT), ii) an end-to-end QoS management approach compliant with the Time-Sensitive Networking (TSN) standard, iii) new approaches for virtualized network environments, such as running TSN-based applications under Ultra-low Latency (ULL) constraints in virtual and 5G environments, and iv) an accelerated and deterministic container overlay network architecture. Additionally, the QoS-aware architecture includes two novel middlewares: i) a middleware that transparently integrates multiple acceleration technologies in heterogeneous Edge contexts and ii) a QoS-aware middleware for Serverless platforms that leverages coordination of various QoS mechanisms and virtualized Function-as-a-Service (FaaS) invocation stack to manage end-to-end QoS metrics. Finally, all architecture components were tested and evaluated by leveraging realistic testbeds, demonstrating the efficacy of the proposed solutions

    Caribbean cultural heritage and the nation:Aruba, Bonaire and Curaçao in a regional context

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    Centuries of intense migrations have deeply impacted expressions of cultural heritage on the ABC islands: Aruba, Bonaire, and Curaçao. This volume queries how cultural heritage on these Dutch Caribbean islands relates to the work of nation building and nation-branding. How does the imagining of a shared political “we” relates to images deliberately produced to market these islands to a world of capital? The contributing authors in this volume address this leading question in their essays that describe and analyze the expressions of the ABC islands. In doing so they compare and contrast nation building and branding on the ABC islands to those taking place in the wider Caribbean. The expressions of cultural heritage discussed range from the importance of sports, music, literature and visual arts to those related to the political economy of tourism, the work of museums, the activism surrounding the question of reparations, and the politics and policies affecting the Caribbean Diasporas in the North Atlantic. This volume adds to the understanding of the dynamics of nation, culture and economy in the Caribbean

    Representing Reactive attachment disorder in contemporary fiction: creating new paths for neurodiverse characters

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    The first element of this work is a novel titled June in the Garden, which follows a neurodiverse protagonist with a diagnosis of reactive attachment disorder. The next section of the exegesis will provide insight into her atypical profile, particularly her traits of social disinhibition, an absence of emotion, affected cognitive processing and reasoning skills, and an inability to initiate and maintain relationships with others. The second element will include two parts: (1) a critical analysis of key diagnostic terms used in the clinical field to describe disorders relating to social-emotional detachment and disengagement, specifically reactive attachment disorder (RAD); (2) discussions on the current depiction of social-emotional detachment and, more broadly, of neurodiversity in contemporary fiction. This second part will argue that the two main pathways to depict a detachment disorder, like RAD, is heterogeneous characterisation, defined by common patterns that are exhibited in the novels selected, and typography, defined by unconventional text arrangement or a presence of visuals on the printed page. Aspects of typography will include deconstruction of the standard print form to allow for creative formatting, such as increased spacing, incomplete sentences, blank pages, and bolding of words. Another aspect will include the addition of specific visuals, such as conceptual word sharks (The Raw Shark Texts, Steven Hall, 2007), black and white photographs (Extremely Loud and Incredibly Close, Jonathan Safran Foer, 2005), and mathematical formulas and blueprints (The Curious Incident of the Dog in the Night-Time, Mark Haddon, 2003). These two methods, heterogeneous characterisation and typography, will explain my creative process for developing a neurodiverse protagonist, showing connections between my work and the work of other fiction writers. However, primarily this research will convey a new pathway for an atypical protagonist with a disorder relatively unknown in the wider community, to recontextualise the presentation of social-emotional detachment in fiction. I also hope to highlight the gaps in RAD research, particularly at the adult level, and to show how RAD can be portrayed realistically in a contemporary novel, without being too ‘gimmicky’

    Authoritarianism and Subject Formation in Post-Independence Egypt: Egyptian Literature and Western Social Theory in Dialogue

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    The study grew out of a desire to examine how it feels to be denied what Hannah Arendt famously referred to as the ‘right to have rights,’ including the right to disobey. More specifically, this study seeks to understand how people living under particular regimes of power—characterised by distinct politics of fear, uncertainty, and silence—feel, define, and express themselves in relation to power, whether in the form of submission or resistance. In other words: How do authoritarian power dynamics affect individuals’ perception of self and how does it play into and shape the everyday life of the individual? At the heart of this inquiry is the notion of the subject, which forms both the conceptual foundation and the central focus of this study. The study draws primarily on the theoretical contributions of Michel Foucault, Giorgio Agamben, and Hannah Arendt on the interplay of power, resistance, and subjectivity. To frame the discussion, a socio-historical examination of post-independence power practices in Egypt and their impact on the constitution of the political subject is conducted. Research data is generated through an art-inspired qualitative research approach, primarily using Egyptian novels as a source of data to uncover the nuances and interiorities of the process of subject formation. Through a dialogue between Western social theory and Egyptian literature, the study provides an understanding of power practice in Egypt from 1952 to the present, particularly at the level of the inner panorama of the self in society and expands it into a reading of social and political theories on the question of power, subjectivity, resistance, and agency. The study is divided into six main chapters, including an introduction and a conclusion. Each empirical chapter of this study tells the story of a particular episode in time and is somewhat self-contained, yet all chapters are connected into a large coherent reading of modern Egyptian power practices. Just as the novels examined in this study tell a story with their words, so does my research. The study concludes that the process of subject formation in Egypt should be understood as an artefact of historical continuity that connects the past to the present, not necessarily in a linear fashion, but in a way that gives it a genealogical context, and as a dynamic process of shifting subject positions. The study further argues for the limitations of the status conception of citizenship as a defining framework for the state—society relationship in the context under study and proposes instead the use of the power—subject framework as a substitute. Last but not least, the study suggests that the connection between theory and method, expressed in the very structure of the research, reveals the epistemic relevance of literature to the conceptual imagination, contributing in a sense, to the discussion of the decolonisation of knowledge production. In some ways, this interdisciplinarity underscores the sheer breadth and hybridity of the concept of subject formation that has become apparent throughout this analysis. Keywords— Power, Subject Formation, Subjectivity, Egyptian Literature, Resistance, Agenc

    Application of knowledge management principles to support maintenance strategies in healthcare organisations

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    Healthcare is a vital service that touches people's lives on a daily basis by providing treatment and resolving patients' health problems through the staff. Human lives are ultimately dependent on the skilled hands of the staff and those who manage the infrastructure that supports the daily operations of the service, making it a compelling reason for a dedicated research study. However, the UK healthcare sector is undergoing rapid changes, driven by rising costs, technological advancements, changing patient expectations, and increasing pressure to deliver sustainable healthcare. With the global rise in healthcare challenges, the need for sustainable healthcare delivery has become imperative. Sustainable healthcare delivery requires the integration of various practices that enhance the efficiency and effectiveness of healthcare infrastructural assets. One critical area that requires attention is the management of healthcare facilities. Healthcare facilitiesis considered one of the core elements in the delivery of effective healthcare services, as shortcomings in the provision of facilities management (FM) services in hospitals may have much more drastic negative effects than in any other general forms of buildings. An essential element in healthcare FM is linked to the relationship between action and knowledge. With a full sense of understanding of infrastructural assets, it is possible to improve, manage and make buildings suitable to the needs of users and to ensure the functionality of the structure and processes. The premise of FM is that an organisation's effectiveness and efficiency are linked to the physical environment in which it operates and that improving the environment can result in direct benefits in operational performance. The goal of healthcare FM is to support the achievement of organisational mission and goals by designing and managing space and infrastructural assets in the best combination of suitability, efficiency, and cost. In operational terms, performance refers to how well a building contributes to fulfilling its intended functions. Therefore, comprehensive deployment of efficient FM approaches is essential for ensuring quality healthcare provision while positively impacting overall patient experiences. In this regard, incorporating knowledge management (KM) principles into hospitals' FM processes contributes significantly to ensuring sustainable healthcare provision and enhancement of patient experiences. Organisations implementing KM principles are better positioned to navigate the constantly evolving business ecosystem easily. Furthermore, KM is vital in processes and service improvement, strategic decision-making, and organisational adaptation and renewal. In this regard, KM principles can be applied to improve hospital FM, thereby ensuring sustainable healthcare delivery. Knowledge management assumes that organisations that manage their organisational and individual knowledge more effectively will be able to cope more successfully with the challenges of the new business ecosystem. There is also the argument that KM plays a crucial role in improving processes and services, strategic decision-making, and adapting and renewing an organisation. The goal of KM is to aid action – providing "a knowledge pull" rather than the information overload most people experience in healthcare FM. Other motivations for seeking better KM in healthcare FM include patient safety, evidence-based care, and cost efficiency as the dominant drivers. The most evidence exists for the success of such approaches at knowledge bottlenecks, such as infection prevention and control, working safely, compliances, automated systems and reminders, and recall based on best practices. The ability to cultivate, nurture and maximise knowledge at multiple levels and in multiple contexts is one of the most significant challenges for those responsible for KM. However, despite the potential benefits, applying KM principles in hospital facilities is still limited. There is a lack of understanding of how KM can be effectively applied in this context, and few studies have explored the potential challenges and opportunities associated with implementing KM principles in hospitals facilities for sustainable healthcare delivery. This study explores applying KM principles to support maintenance strategies in healthcare organisations. The study also explores the challenges and opportunities, for healthcare organisations and FM practitioners, in operationalising a framework which draws the interconnectedness between healthcare. The study begins by defining healthcare FM and its importance in the healthcare industry. It then discusses the concept of KM and the different types of knowledge that are relevant in the healthcare FM sector. The study also examines the challenges that healthcare FM face in managing knowledge and how the application of KM principles can help to overcome these challenges. The study then explores the different KM strategies that can be applied in healthcare FM. The KM benefits include improved patient outcomes, reduced costs, increased efficiency, and enhanced collaboration among healthcare professionals. Additionally, issues like creating a culture of innovation, technology, and benchmarking are considered. In addition, a framework that integrates the essential concepts of KM in healthcare FM will be presented and discussed. The field of KM is introduced as a complex adaptive system with numerous possibilities and challenges. In this context, and in consideration of healthcare FM, five objectives have been formulated to achieve the research aim. As part of the research, a number of objectives will be evaluated, including appraising the concept of KM and how knowledge is created, stored, transferred, and utilised in healthcare FM, evaluating the impact of organisational structure on job satisfaction as well as exploring how cultural differences impact knowledge sharing and performance in healthcare FM organisations. This study uses a combination of qualitative methods, such as meetings, observations, document analysis (internal and external), and semi-structured interviews, to discover the subjective experiences of healthcare FM employees and to understand the phenomenon within a real-world context and attitudes of healthcare FM as the data collection method, using open questions to allow probing where appropriate and facilitating KM development in the delivery and practice of healthcare FM. The study describes the research methodology using the theoretical concept of the "research onion". The qualitative research was conducted in the NHS acute and non-acute hospitals in Northwest England. Findings from the research study revealed that while the concept of KM has grown significantly in recent years, KM in healthcare FM has received little or no attention. The target population was fifty (five FM directors, five academics, five industry experts, ten managers, ten supervisors, five team leaders and ten operatives). These seven groups were purposively selected as the target population because they play a crucial role in KM enhancement in healthcare FM. Face-to-face interviews were conducted with all participants based on their pre-determined availability. Out of the 50-target population, only 25 were successfully interviewed to the point of saturation. Data collected from the interview were coded and analysed using NVivo to identify themes and patterns related to KM in healthcare FM. The study is divided into eight major sections. First, it discusses literature findings regarding healthcare FM and KM, including underlying trends in FM, KM in general, and KM in healthcare FM. Second, the research establishes the study's methodology, introducing the five research objectives, questions and hypothesis. The chapter introduces the literature on methodology elements, including philosophical views and inquiry strategies. The interview and data analysis look at the feedback from the interviews. Lastly, a conclusion and recommendation summarise the research objectives and suggest further research. Overall, this study highlights the importance of KM in healthcare FM and provides insights for healthcare FM directors, managers, supervisors, academia, researchers and operatives on effectively leveraging knowledge to improve patient care and organisational effectiveness

    Parallel and Flow-Based High Quality Hypergraph Partitioning

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    Balanced hypergraph partitioning is a classic NP-hard optimization problem that is a fundamental tool in such diverse disciplines as VLSI circuit design, route planning, sharding distributed databases, optimizing communication volume in parallel computing, and accelerating the simulation of quantum circuits. Given a hypergraph and an integer kk, the task is to divide the vertices into kk disjoint blocks with bounded size, while minimizing an objective function on the hyperedges that span multiple blocks. In this dissertation we consider the most commonly used objective, the connectivity metric, where we aim to minimize the number of different blocks connected by each hyperedge. The most successful heuristic for balanced partitioning is the multilevel approach, which consists of three phases. In the coarsening phase, vertex clusters are contracted to obtain a sequence of structurally similar but successively smaller hypergraphs. Once sufficiently small, an initial partition is computed. Lastly, the contractions are successively undone in reverse order, and an iterative improvement algorithm is employed to refine the projected partition on each level. An important aspect in designing practical heuristics for optimization problems is the trade-off between solution quality and running time. The appropriate trade-off depends on the specific application, the size of the data sets, and the computational resources available to solve the problem. Existing algorithms are either slow, sequential and offer high solution quality, or are simple, fast, easy to parallelize, and offer low quality. While this trade-off cannot be avoided entirely, our goal is to close the gaps as much as possible. We achieve this by improving the state of the art in all non-trivial areas of the trade-off landscape with only a few techniques, but employed in two different ways. Furthermore, most research on parallelization has focused on distributed memory, which neglects the greater flexibility of shared-memory algorithms and the wide availability of commodity multi-core machines. In this thesis, we therefore design and revisit fundamental techniques for each phase of the multilevel approach, and develop highly efficient shared-memory parallel implementations thereof. We consider two iterative improvement algorithms, one based on the Fiduccia-Mattheyses (FM) heuristic, and one based on label propagation. For these, we propose a variety of techniques to improve the accuracy of gains when moving vertices in parallel, as well as low-level algorithmic improvements. For coarsening, we present a parallel variant of greedy agglomerative clustering with a novel method to resolve cluster join conflicts on-the-fly. Combined with a preprocessing phase for coarsening based on community detection, a portfolio of from-scratch partitioning algorithms, as well as recursive partitioning with work-stealing, we obtain our first parallel multilevel framework. It is the fastest partitioner known, and achieves medium-high quality, beating all parallel partitioners, and is close to the highest quality sequential partitioner. Our second contribution is a parallelization of an n-level approach, where only one vertex is contracted and uncontracted on each level. This extreme approach aims at high solution quality via very fine-grained, localized refinement, but seems inherently sequential. We devise an asynchronous n-level coarsening scheme based on a hierarchical decomposition of the contractions, as well as a batch-synchronous uncoarsening, and later fully asynchronous uncoarsening. In addition, we adapt our refinement algorithms, and also use the preprocessing and portfolio. This scheme is highly scalable, and achieves the same quality as the highest quality sequential partitioner (which is based on the same components), but is of course slower than our first framework due to fine-grained uncoarsening. The last ingredient for high quality is an iterative improvement algorithm based on maximum flows. In the sequential setting, we first improve an existing idea by solving incremental maximum flow problems, which leads to smaller cuts and is faster due to engineering efforts. Subsequently, we parallelize the maximum flow algorithm and schedule refinements in parallel. Beyond the strive for highest quality, we present a deterministically parallel partitioning framework. We develop deterministic versions of the preprocessing, coarsening, and label propagation refinement. Experimentally, we demonstrate that the penalties for determinism in terms of partition quality and running time are very small. All of our claims are validated through extensive experiments, comparing our algorithms with state-of-the-art solvers on large and diverse benchmark sets. To foster further research, we make our contributions available in our open-source framework Mt-KaHyPar. While it seems inevitable, that with ever increasing problem sizes, we must transition to distributed memory algorithms, the study of shared-memory techniques is not in vain. With the multilevel approach, even the inherently slow techniques have a role to play in fast systems, as they can be employed to boost quality on coarse levels at little expense. Similarly, techniques for shared-memory parallelism are important, both as soon as a coarse graph fits into memory, and as local building blocks in the distributed algorithm

    Habits of Mind: Designing Courses for Student Success

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    Although content knowledge remains at the heart of college teaching and learning, forward-thinking instructors recognize that we must also provide 21st-century college students with transferable skills (sometimes called portable intellectual abilities) to prepare them for their futures (Vazquez, 2020; Ritchhart, 2015; Venezia & Jaeger, 2013; Hazard, 2012). To “grow their capacity as efficacious thinkers to navigate and thrive in the face of unprecedented change” (Costa et al., 2023), students must learn and improve important study skills and academic dispositions throughout their educational careers. If we do not focus on skills-building in college courses, students will not be prepared for the challenges that await them after they leave institutions of higher education. If students are not prepared for these postsecondary education challenges, then it is fair to say that college faculty have failed them
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